Setting the Pulse Oximeter Mode

  1. From the watch face, hold Middle-left button.
  2. Select Watch Settings > Health & Wellness > Pulse Oximeter.
  3. Select an option:
    • To turn on measurements while you are inactive during the day, select All Day.

      NOTE: Turning on All Day mode decreases battery life.
    • To turn on continuous measurements while you sleep, select During Sleep.

      NOTE: Unusual sleep positions can cause abnormally low sleep-time SpO2 readings.
    • To turn off automatic measurements, select On Demand.

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November 2025